/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/Selection/DynamicMeshPolygroupTransformer.h
Finish a transform (eg called on mouse-up during 3D gizmo interaction). The caller provides a TransactionsAPI implementation which the Transformer/Selector can use to emit change events
virtual void EndTransform ( [IToolsContextTransactionsAPI](API\Runtime\InteractiveToolsFramework\IToolsContextTransactionsAPI) * TransactionsAPI )